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3 years ago

What is the empirical formula for a compound that is 43.6% phosphorus

Chemistry

1 answer:

Kazeer [188]3 years ago

3 0

Answer:

d. P2O5.

Explanation:

We find the ratio of the atoms by dividing the percentages by the relative atomic masses:

P : 43.6 / 30.974 = 1.4076

O: 56.4 / 15.999 = 3.5252

1.4076 : 3.5252

= 1 : 2.5

= 2:5.

So the answer is P2O5.

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3 years ago

How many grams of NH3 can be dissolved in 50 grams of water at 50oC?

weqwewe [10]

15 grams of NH3 can be dissolved

<h3>Further explanation</h3>

Given

50 grams of water at 50°C

Required

mass of NH3

Solution

Solubility is the maximum amount of a substance that can dissolve in some solvents. Factors that affect solubility

1. Temperature:
2. Surface area:
3. Solvent type:
4. Stirring process:

We can use solubility chart (attached) to determine the solubility of NH3 at 50°C

From the graph, we can see that the solubility of NH3 in 100 g of water at 50 C is 30 g

So that the solubility in 50 grams of water is:

= 50/100 x 30

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